Water scarcity problems are likely to worsen because of climate change, and the world is not doing enough to address the challenges, according to the head of a United Nations panel of climate scientists.

Water utilities in more than 20 communities across the United States will receive extra funding from the U.S. Environmental Protection Agency (EPA) to strengthen their climate change resilience and readiness.

Over the past few years, communities in the U.S. Southwest have increasingly felt the devastating effect of drought and, according to a report by a team of scientists at the University of Arizona, the worst is yet to come.